106164718921 has 4 divisors (see below), whose sum is σ = 106169663952. Its totient is φ = 106159773892.

The previous prime is 106164718861. The next prime is 106164718951. The reversal of 106164718921 is 129817461601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 129817461601 = 19 ⋅6832497979.

It is a cyclic number.

It is not a de Polignac number, because 106164718921 - 2⁹ = 106164718409 is a prime.

It is a super-2 number, since 2×106164718921² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106164718951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2440171 + ... + 2483296.

It is an arithmetic number, because the mean of its divisors is an integer number (26542415988).

Almost surely, 2^106164718921 is an apocalyptic number.

It is an amenable number.

106164718921 is a deficient number, since it is larger than the sum of its proper divisors (4945031).

106164718921 is an equidigital number, since it uses as much as digits as its factorization.

106164718921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4945030.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 106164718921 in words is "one hundred six billion, one hundred sixty-four million, seven hundred eighteen thousand, nine hundred twenty-one".